The Pi2Design 503HTA Hybrid Tube DAC thread

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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby PinAndTube » Mon Nov 28 2016 08:45

I just received my tube amp and started to play with it.

Raspberry PI 2 in use.
Installed Volumio into SD card.
Opened volumio.local and took plugins for tube-amp("503HTA Plugin") and power("cant remember the name") into use. And restart.

Question is that does plugin power("cant remember the name") contain the the RPi.GPIO?

Any way - I did the step:
"Install python's RPi.GPIO on volumio: (Pi2 only"
http://www.pi2design.com/uploads/4/8/5/ ... _setup.pdf

I also moved MP3's into MicroSD internal folder using SFTP.
And changed passwords for root and volumio accounts with SSH.

Now everything is working - mostly.
(Am I still missing something?)



There seems to be noise coming from PI2. Usually when
I am mostly using Wifi but I tried to use cable also but noise seems to be there.

Feeling is that noice comes somehow to PI working and when data is read from microSD etc.
I guess this is now the rail issue.
https://www.kickstarter.com/projects/18 ... ts/1691242
This is somewhat annoying.

There is talk about soldering in comments
https://www.kickstarter.com/projects/18 ... i/comments
Any ideas if that could be solutions?

Or if there would be more some cheaper option somewhere?
http://www.targus.com/us/laptop-charger ... rt-apa32us

My first comment seems to be quite big. ;)
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby michelangelo » Mon Nov 28 2016 09:17

See in the first post:
IMPORTANT
If used with Raspberry PI3, Wi-fi MUST be disabled (or use an external wi-fi dongle). Unfortunately the gate of the FETs ends up just above the wireless antenna, resulting in an audible noise when Wi-Fi is in use.

You can disable wi-fi from network options -> enable wi-fi to off
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby rmcgeher » Wed Dec 14 2016 17:41

Got mine all setup and working great. Love it.

Question - what is the best way to turn it off when not using it?

I was thinking about getting or building a 2 outlet power strip with a switch.

When I use the Volumio shutdown or power off option from the web GUI, it seems to suspend the Raspberry Pi 3, red light still on. The problem is there is no way to turn it back on without unplugging and plugging back in the power.

Also, that power off option does not seem to control the 503HTA Hybrid Tube DAC.

Thanks for any thoughts.

Rich
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby advr61 » Mon Jan 02 2017 10:25

Hi,

Nice Tube preamp.

is it also possible to combine it with one of the available poweramps?

Thanks, regards.
Ad.
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby gridgway » Sat Jan 07 2017 23:41

Hi, I am wondering...is the valve stage just for the headphone out, or is it involved in the line out as well?

In fact is there a line out to go into a pre-amp?

Thanks
Graham
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby tom47111 » Thu Jan 12 2017 21:15

Hi, I have just received my Tube DAC and set it up. Unfortunately it does not work. Checked all tips from the previous posts. Turned off WiFi. Installed relevant PlugIn. Mixer typ is "none". I do have a power supply of 24V and 5A. I still do not get sound although the GUI shows progress on the titel, but it also says "Failed to open audio output". Previously I had a hifiberry DAC and it worked perfectly. I have a RPi 3 with the latest volumio freshly installed. Can you help me?
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby tom47111 » Sat Jan 14 2017 07:38

Hi, finally got it to work. Don't know how! Now I hear a periodic (about every second for a second) high frequency tone when it is switch on. Is that normal? Stopped using it. Is there any idea how to get rid of the tone?
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby mvn » Mon Jan 23 2017 09:48

rmcgeher wrote:Question - what is the best way to turn it off when not using it?


There is actually a couple of pins on the GPIO and unit to control the power to both the Pi and the Tube amp when you turn the volume control all the way down to the 'off' position. This enables a graceful shutdown first on the Pi, then signals the tube amp to cut the power. Works very well HOWEVER it requires a few custom python packages and some code.

See page 7 of this guide: http://www.pi2design.com/uploads/4/8/5/ ... _setup.pdf

Installing the python packages installed all kinds of other crap and I can see now that my volumio instance is becoming a lot less reliable (Gui and Airplay hang, can still SSH in).

Michaelangelo - any chance of you including the Rpi.GPIO package and this configuration in the 503HTA plugin settings so we don't have to tinker with apt-get and the like? Happy to be a test puppy!
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The Pi2Design 503HTA Hybrid Tube DAC thread

Postby mvn » Sun Feb 05 2017 05:15

mvn wrote:
Michaelangelo - any chance of you including the Rpi.GPIO package and this configuration in the 503HTA plugin settings so we don't have to tinker with apt-get and the like? Happy to be a test puppy!

BUMP
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